Linked Life Data

17244896

Source:http://linkedlifedata.com/resource/pubmed/id/17244896

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2007-5-3
pubmed:abstractText
The idea that an osmotically inactive Na(+) storage pool exists that can be varied to accommodate states of Na(+) retention and/or Na(+) loss is controversial. We speculated that considerable amounts of osmotically inactive Na(+) are lost with growth and that additional dietary salt excess or salt deficit alters the polyanionic character of extracellular glycosaminoglycans in osmotically inactive Na(+) reservoirs. Six-week-old Sprague-Dawley rats were fed low-salt (0.1%; LS) or high-salt (8%; HS) diets for 1 or 4 wk. At their death, we separated the tissues and determined their Na(+), K(+), and water content. Three weeks of growth reduced the total body Na(+) content relative to dry weight (rTBNa(+)) by 23%. This "growth-programmed" Na(+) loss originated from the bone and the completely skinned and bone-removed carcasses. The Na(+) loss was osmotically inactive (45-50%) or osmotically active (50-55%). In rats aged 10 wk, compared with HS, 4 wk of LS reduced rTBNa(+) by 9%. This dietary-induced Na(+) loss was osmotically inactive ( approximately 50%) and originated largely from the skin, while approximately 50% was osmotically active. LS for 1 wk did not reduce skin Na(+) content. The mobilization of osmotically inactive skin Na(+) with long-term salt deprivation was associated with decreased negatively charged skin glycosaminoglycan content and thereby a decreased water-free Na(+) binding capacity in the extracellular matrix. Our data not only serve to explain discrepant results in salt balance studies but also show that glycosaminoglycans may provide an actively regulated interstitial cation exchange mechanism that participates in volume and blood pressure homeostasis.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
1931-857X
pubmed:author
pubmed:issnType
Print
pubmed:volume
292
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
F1490-500
pubmed:dateRevised
2011-4-28
pubmed:meshHeading
pubmed-meshheading:17244896-Aging, pubmed-meshheading:17244896-Animals, pubmed-meshheading:17244896-Body Water, pubmed-meshheading:17244896-Diet, Sodium-Restricted, pubmed-meshheading:17244896-Diuresis, pubmed-meshheading:17244896-Dose-Response Relationship, Drug, pubmed-meshheading:17244896-Extracellular Matrix, pubmed-meshheading:17244896-Glycosaminoglycans, pubmed-meshheading:17244896-Growth, pubmed-meshheading:17244896-Male, pubmed-meshheading:17244896-Natriuresis, pubmed-meshheading:17244896-Osmosis, pubmed-meshheading:17244896-Potassium, pubmed-meshheading:17244896-Rats, pubmed-meshheading:17244896-Rats, Sprague-Dawley, pubmed-meshheading:17244896-Skin, pubmed-meshheading:17244896-Sodium, pubmed-meshheading:17244896-Sodium Chloride, pubmed-meshheading:17244896-Sodium Chloride, Dietary
pubmed:year
2007
pubmed:articleTitle
Mobilization of osmotically inactive Na+ by growth and by dietary salt restriction in rats.
pubmed:affiliation
Department of Nephrology and Hypertension, Friedrich-Alexander-University, Erlangen, Nürnberg, Germany.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't